Why are old people SO against self checkout?

EDIT: perhaps old wasn’t a good word, the guy was more 60s.

I had a guy with a small cart and maybe like 6 items come in at like 9:50ish and our last cashier left at 10 (store closes at 11) and I was on self checkout. He asks if there’s any cashiers, I say no he just left, and this old fuck had the nerve to walk away from his cart and say “I’m not doing it!” and about to leave the store in protest. So my manager had me go over and open up a register just so this man-child could have his items rung up. And while I check him out, he tells me he won’t use self checkout (so much against it he’d rather just walk out).

It doesn’t shoot lasers at you! Some people come in late when we may or may not have a cashier & act like it’s a crime they have to scan their own groceries. It’s absurd!!!